Finding the Third Proportional to 1,086,272 and 1,643,388

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,272 : 1,643,388 = 1,643,388 : x
2. Step 2: Convert to fraction form
   1,086,272/1,643,388 = 1,643,388/x
3. Step 3: Cross multiply
   1,086,272x = 1,643,388 × 1,643,388
4. Step 4: Simplify right side
   1,086,272x = 2,700,724,118,544
5. Step 5: Solve for x
   x = 2,700,724,118,544/1,086,272
6. Step 6: Final answer
   x = 2,486,231.92